Our Privacy/Cookie Policy contains detailed information about the types of cookies & related technology on our site, and some ways to opt out. By using the site, you agree to the uses of cookies and other technology as outlined in our Policy, and to our Terms of Use.

Close

How to Tell the Difference Between Male & Female Molly Fish

By Jodi Thornton O'Connell

Mollies are easy-to-keep tropical fish ideal for novice aquarists. Mollies, of family Poeciliidae, come in colors including black, white, orange, marbled and others. Mollies can be fun to breed. Differing between the male and female members of the species is easy to do.

Male Mollies

It is fairly easy to determine the sex of a male molly. Males are more torpedo-shaped and have bigger fins than females. The males also have pointed gonopodia, modified anal fins they use to mate with females. Dominant male mollies intensify in color and grow larger fins to produce a mating show for females or to show dominance to other males.

Female Mollies

Female mollies have bulky figures; they're wider than males at the rear of the abdomen for breeding purposes. When pregnant, she will take on a bulging, lumpy appearance. Her fins are shorter; the anal fins are triangular.

Video of the Day

Brought to you by Cuteness
Brought to you by Cuteness

Author

Indulging her passion for vacation vagary through the written word on a full-time basis since 2010, travel funster Jodi Thornton-O'Connell guides readers to the unexpected, quirky, and awe-inspiring.

Cite this Article A tool to create a citation to reference this article Cite this Article

See More Animals